they pruned a laurel hedge, squeezing it a lot, it's almost empty, will it recover? the hedge has large trunks, is 15 years old !!!
often the hedges tend to become very large and to occupy a lot of space, forcing us to vigorous pruning; generally the laurel (it could be prunus lauroceraso, or laurel, or laurus nobilis) tends to be a vigorous plant, which is easily recovered from pruning of any kind.
Clear that now the plant is in vegetative rest, so you will have to wait for spring to be able to see the new shoots; I believe that over a few weeks, in March-April, the plant should produce a good amount of new branches, which will cover the gaps left by the pruning.